:root {
  --bg: #0a1220;
  --bg-soft: #0f1c30;
  --panel: rgba(13, 28, 46, 0.72);
  --line: rgba(137, 215, 255, 0.24);
  --text: #eef8ff;
  --text-soft: #b2cce0;
  --brand: #2ac3ff;
  --brand-strong: #00f5b4;
  --max: 1080px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: "Space Grotesk", "Noto Sans SC", sans-serif;
  background: radial-gradient(circle at 20% 10%, #173053 0%, transparent 40%),
    radial-gradient(circle at 88% 18%, #153e52 0%, transparent 34%), linear-gradient(145deg, var(--bg), #07101b 70%);
  color: var(--text);
  overflow-x: hidden;
}

.bg-layer {
  position: fixed;
  border-radius: 50%;
  filter: blur(45px);
  opacity: 0.24;
  pointer-events: none;
  z-index: -1;
  animation: drift 14s ease-in-out infinite;
}

.bg-layer-1 {
  width: 360px;
  height: 360px;
  background: #00e8ff;
  top: -120px;
  left: -80px;
}

.bg-layer-2 {
  width: 420px;
  height: 420px;
  background: #00ff9d;
  right: -140px;
  bottom: -160px;
  animation-delay: -5s;
}

@keyframes drift {
  0% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(20px, -14px) scale(1.06);
  }
  100% {
    transform: translate(0, 0) scale(1);
  }
}

.nav {
  width: min(100%, var(--max));
  margin: 14px auto 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(8, 19, 33, 0.62);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 10px;
  z-index: 10;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
}

.brand-dot {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand-strong));
  box-shadow: 0 0 18px rgba(42, 195, 255, 0.8);
}

.brand-text {
  font-weight: 700;
  letter-spacing: 0.4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-links a {
  color: var(--text-soft);
  text-decoration: none;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--text);
}

.lang-btn {
  border: 1px solid var(--line);
  background: rgba(42, 195, 255, 0.12);
  color: var(--text);
  border-radius: 10px;
  height: 34px;
  padding: 0 12px;
  cursor: pointer;
  font-weight: 700;
}

main {
  width: min(100%, var(--max));
  margin: 24px auto 0;
  padding: 0 12px 38px;
}

.hero {
  padding: 44px 30px 28px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: linear-gradient(130deg, rgba(12, 31, 51, 0.78), rgba(8, 18, 31, 0.68));
}

.eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: 1.9px;
  color: var(--brand-strong);
}

.hero h1 {
  margin: 8px 0 12px;
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.1;
  max-width: 760px;
}

.hero-text {
  margin: 0;
  max-width: 740px;
  color: var(--text-soft);
  font-size: clamp(15px, 2.2vw, 19px);
  line-height: 1.65;
}

.hero-actions {
  margin-top: 22px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand), #12a3ff);
  color: #03111d;
  box-shadow: 0 8px 24px rgba(42, 195, 255, 0.32);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.section {
  margin-top: 24px;
  padding: 24px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(8px);
}

.section h2 {
  margin: 0 0 16px;
  font-size: clamp(23px, 3vw, 32px);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.card {
  padding: 16px;
  border-radius: 12px;
  border: 1px solid rgba(119, 198, 236, 0.2);
  background: rgba(0, 0, 0, 0.15);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 19px;
}

.card p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.6;
}

.steps {
  margin: 0;
  padding-left: 18px;
  color: var(--text-soft);
  line-height: 1.8;
  font-size: 16px;
}

.arg-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.arg-list span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 34px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid rgba(129, 220, 255, 0.32);
  background: rgba(20, 44, 68, 0.7);
  color: #e5f8ff;
  font-family: "Consolas", "Space Grotesk", monospace;
  font-size: 13px;
}

.faq-list {
  display: grid;
  gap: 10px;
}

.faq-list details {
  border: 1px solid rgba(129, 220, 255, 0.32);
  border-radius: 10px;
  padding: 10px 12px;
  background: rgba(12, 33, 51, 0.7);
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
}

.faq-list p {
  margin: 10px 0 0;
  color: var(--text-soft);
  line-height: 1.7;
}

.cta {
  text-align: center;
  background: linear-gradient(135deg, rgba(8, 30, 44, 0.86), rgba(2, 18, 33, 0.82));
}

.cta p {
  margin: 0;
  color: var(--text-soft);
}

.footer {
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 16px 12px 28px;
  color: #a5c3d8;
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .hero {
    padding: 30px 18px 20px;
  }

  .section {
    padding: 20px 16px;
  }

  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .card-grid {
    grid-template-columns: 1fr;
  }
}